.box{
	background-color: #ccc;
	width: 400px;
	height: 200px;
	position: relative;
	top: 50%;
	left: 50%;
	margin-left: -200px;
	margin-top: 200px;

}
.container{
	width: 100%;
}
.box div{
	width: 50px;
	height: 50px;
	background-color: yellow;
}
.box1{
	border-radius: 0 0 50px 0;
}
.box2{
	position: relative;
	left: 350px;
	top: 100px;
	border-radius: 50px 0 0 0 ;
}